If_______ (training),most people can enjoy this simple sport
问题描述：
If_______ (training),most people can enjoy this simple sport
答
和句子主要most people 之间是被动关系，所以应该用过去分词trained 来做状语
答
trained 完整句子应为if most people are trained, .....
因为从句主句主谓语一致，从句便可以省去主谓句~
答
trained 被动式,相当于they are trained.
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